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5 Written Questions

5 Matching Questions

  1. Pelagic Zone
  2. Trace Elements
  3. Salinity
  4. Bathyal Zone
  5. Reverse Osmosis Desalination
  1. a A popular method for desalinating ocean water. It includes the use of special membranes that allow water under high pressure to pass through and that block the dissolved salts.
  2. b Begins at the continental slope and extends to a depth of 4,000 meters.
    animals that live there: octopi, sea stars, and brachiopods.
  3. c The region of an ocean or body of fresh water above the benthic zone.
  4. d A measure of the amount of dissolved salts in a given amount of liquid. It can be written as salinity = 35 parts per thousand, or 35%.
  5. e Elements that exist in very small amounts.
    ex: gold, zinc, and phosphorus.

5 Multiple Choice Questions

  1. Potato-shaped lumps of minerals that are found on the abyssal floor of the ocean.
  2. Microscopic plants in the ocean that provide food to many of the ocean's organisms.
  3. All organisms that swim actively in open water, independent of currents
  4. The movement of deep, cold, and nutrient-rich water to the surface.
  5. The shallowest benthic zone that lies between the low-tide and high-tide lines.

5 True/False Questions

  1. FreezingThe movement of deep, cold, and nutrient-rich water to the surface.


  2. Sublittoral ZoneThe shallow benthic zone that most organisms live in; located on the continental shelves and is populated by organisms such as sea stars, brittle stars, and sea lilies.


  3. DensityOrganisms that live at the bottom of oceans or bodies of fresh water.


  4. Benthic ZoneThe bottom region of oceans and bodies of fresh water.


  5. DesalinationA method of desalination where ocean water is heated to remove salt. Heat causes liquid water to evaporate and leave dissolved salts behind. When the water vapor condenses, the result is pure fresh water.


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